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<br />FLUCTUATING FLOWS AND BACKWATER HABITATS <br /> <br />1129 <br /> <br />Build backwater from input ce II data <br /> <br />Update cell depths using flow input data, <br />mainstem flow-river stage equation and the <br />'loop-through neighbors' approach <br /> <br /> <br />Calcu late (I) total change in backwater <br />volume and (2) inflow from the mainstem <br /> <br /> <br />Calculate backwater temperature from <br />inflow, mainstem temperature and hourly <br />weather data <br /> <br />Calculate hourly backwater variables <br /> <br /> <br />No <br /> <br />Calculate daily backwater variables <br /> <br />Calculate daily invertebrate production <br /> <br />No <br /> <br /> <br />Figure 3, Flow diagram of the backwater habitat model's schedules and processes <br /> <br />Mainstem stage or elevation (Em, m) wa.', assumed to be an exponential function of flow (with parameters fit to the <br />observed relationship between mainstem flow (Q, m3 , s -I) and mainstem stage at the nearest flow gauge (U.S, Geological <br />Survey gauge 09261000, Green River near Jensen, Utah) in August 2003 (all If- values> 0,96) plm the difference <br />between mainstem stage at Jensen and water surface elevation measured at the mouth of the backwater (M, my: <br /> <br />Em = 0,108 QO.52{, + !1E <br /> <br />(1) <br /> <br />Tahle 1. Backwater characteristics as measured in August, 2003 <br /> <br />Measure <br /> <br />BW1 <br /> <br />BW2 <br /> <br />BW3 BW4 BW5 BW6 <br />502 220 587 1222 <br />81 60 136 824 <br />0,16 0,27 0,23 0,67 <br />0,51 0,73 0,76 2.44 <br />1424,6 1422,5 1426.6 1424.3 <br /> <br />Area (m2) <br />Volume (m3) <br />Mean depth (m) <br />Maximum depth (m) <br />Water surface elevation (m) <br /> <br />399 <br />142 <br />0,35 <br />1.16 <br />1416,2 <br /> <br />1744 <br />854 <br />0.49 <br />1.42 <br />1424,7 <br /> <br />Copyright t" 2006 John Wiley & Sons, Ltd, <br /> <br />River Res, Applic, 22: 1125-1142 (2006) <br />DOl: lO,1002lrr.; <br />